According to the requirements of huge customers and resource’s access policy diversification in distributed service environments and application limitation of access control models, this paper proposes an Attribute And Rule-based Access Control(ARBAC) model for multiple users service mode.

Based on introducing the conception,types and characters of electronic publications,and connecting with the real situations of the library of Hanshan Teacher s College,this paper discusses on th e acquisition tactics of the electronic publications,and puts f orward some matters needing attention in the course of purchasing electr onic publica-tions.

Implementing access policies with hidden credentials;